This happens in both Survival and Creative, tested only in singleplayer, but whenever I go to destroy/click a block, it causes my character to stop moving, with me having to re-press the movement keys.
I'm hoping this isn't a permanent feature for minecraft, and that a similar report doesn't exist.
Cheers!
Duplicate of MC-3386 , please use the search function to see if your bug has already been submitted. Currently over 35% of tickets are being closed as duplicate.